What is the constant of proportionality for the relationship shown in the table a.1/2 b.2 c.4 d.8

Ab and bc form a right angle at point b. if a= (-3,-1) and b= (4,4) what is the equation of bc?

Sketch the region enclosed by the given curves. decide whether to integrate with respect to x or y. draw a typical approximating rectangle and label its height and width. y= 5x, y=7x^2then find the area s of the region.

This is about circle theorems. someone asap : (